New APT Immersion Timeswitch Heater Won't Switch On

[UI_Paddy]

How did this sound - its just a heater in the tank ? Not sure what you would hear , but never listened closely

It's usually a humming sound, like air is circulating fast if that makes sense. I have attached photos of where this sound usually comes from.

Whats a HOT PRESS?

How long has it been left 'ON" for - our immersion takes a while to heat up a small tank, probably a couple of hours to get hot.

Not sure i understand that either
If an Immersion it just heats a tank of water - I suspect after 1/2hour it maybe warm not as cold as the cold tap.

Hot press is where we have our hot water tank and washed clothes we want to dry. Not sure what's the name for it outside Ireland.

Problem is after half an hour nothing was warm, the water, hot water tank and radiators were all still cold. With our old switch it only took half an hour at most to heat them all.

Was the timer set to run ALL night then , and no hot this morning ?

maybe best if its set to heating on "ON" with Neon ON and after a few hours, water should be at least warm, depending on Temp Setting on thermostat , if has one - and as posted maybe it needs a reset

It was on CLOCK and set to a time this morning set by the electrician at my request, but it never went on this morning.

We never used to leave our old switch ON for any more than an hour as we were warm enough after that, and didn't want to be spending too much on oil. Should I leave the switch to ON for a few hours?

 

[ericmark]

Confused one minute talking about an immersion heater, next oil.

 

[ETAF]

So I had my electrician fit and install a new immersion switch yesterday, as the Clock function wasn't working on our old one.

I assumed from the opening post , all this timer did was turn an immersion heater, in a water tank, on/off not actually control a full Oil Fired Central Heating & Water system, I suspect you are hearing the CH Pump, or boiler firing up.

Immersion heater Labelled "(A)"
https://www.schoolphysics.co.uk/age14-16/Heat energy/Heat energy/text/Immersion_heaters/index.html

 

[winston1]

Hot press is where we have our hot water tank and washed clothes we want to dry. Not sure what's the name for it outside Ireland.

Airing cupboard.

 

[UI_Paddy]

Confused one minute talking about an immersion heater, next oil.

The immersion uses oil from our tank to heat the water, radiators and the house.

 

[JohnD]

The immersion uses oil from our tank to heat the water, radiators and the house.

An immersion heater is an electrical device.

I think you are talking about the hot-water cylinder. Or possibly a boiler.

A hot water cylinder can be heated by a boiler and/or by an immersion heater inside it.

 

[JohnD]

immersion heater

examples of hot-water cylinders

example of cold-water tank

 

[ericmark]

Willis type immersion heater common in Ireland.

 

[UI_Paddy]

It's like that one yes. Pardon my ignorance.

Would anyone recommend leaving the immersion on CLOCK all the time or ON for a few hours to see if the heat comes? As I say it used to take no more than half an hour.

 

[ericmark]

In the winter I can turn my domestic hot water heating off, it heats up anyway. The question is really what has gone wrong. We have to remember it is Ireland and you may have systems we are unaware of, but in mainland UK we use the Honeywell Plans. S, W, Y, and C.

We get two port

and three port

valves S uses in the main 2 x 2 port W and Y uses 3 port, and C often non but some times a 2 port is used. In this

one you can see the manual operating lever and often you can latch the lever open. So it should be simple to find out if the valve at fault.

But as it stands we are guessing, pictures are always good.

 

[JohnD]

It's like that one yes. Pardon my ignorance.

Would anyone recommend leaving the immersion on CLOCK all the time or ON for a few hours to see if the heat comes? As I say it used to take no more than half an hour.

Have a look at your electricity meter. If it is like ours, it has either a spinning wheel or a flashing light, depending on age. The more electricity you use the faster they go. When you turn on the electric immersion heater, it will draw 3kW, so the speed should increase. It heats water at the rate of about 1 litre per minute, so a hundred litres takes about 1 hour 40 mins, after which its internal thermostat should turn it off, until you use some of the hot water.

Give it a try.

The electric immersion heater switch has no effect on the boiler.

But if you have an oil (or gas) boiler, it should never be necessary to turn on the electric immersion heater, unless the boiler is out of action for some reason. Electricity is expensive.

 

[UI_Paddy]

Thanks all for the advice.

Electrician came and found a wire was loose.